Azimuth marks associated with geocaching.com's benchmarks need a place to be waymarked and logged. These marks are associated with Survey Disks, Triangulation Station Disks, and Horizontal Control Disks and are a great challenge to find. Azimuth marks typically are not associated with, "Benchmark Disks, Vertical Control Disks, or Metal Rods." These types of marks if not already listed on geocaching.com can be logged under the "Recovered US Benchmarks" category.